Geometry Quiz

Calculate the diameter of a circle if the circumference is 16π inches.

Calculate the diameter of a circle if the circumference is 8π yards.

Calculate the circumference of a circle with a diameter of 4 km.

Calculate the circumference of a circle with a diameter of 18 inches.

What is the circumference?

• 36

• 56.52

• 108

• 113.04

The Jones family wants to enclose their circular garden with a fence. To the nearest foot, what is the minimum length of fencing they need to buy?

• 56.25 ft
• 246 ft
• 365 ft
• 393 ft

Find the circumference of the following circle:

• 4π ft

• 16π ft

• 2π ft

• 8π ft

The radius of the circle is 9 meters.  What is the circle's circumference?

• 9 meters
• 28.26 meters
• 56.52 meters
• 18 meters

Find the circumference of the circle.

• 78.5 cm

• 15.7 cm

• 7.85 cm

• 19.6 cm

What is the area of a circle with a radius of 7 cm?